39 lines
968 B
C
39 lines
968 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/minmax.h>
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#include <linux/string.h>
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#include <asm/ebcdic.h>
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#include <asm/ipl.h>
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/* VM IPL PARM routines */
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size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
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const struct ipl_parameter_block *ipb)
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{
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int i;
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size_t len;
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char has_lowercase = 0;
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len = 0;
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if ((ipb->ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP) &&
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(ipb->ccw.vm_parm_len > 0)) {
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len = min_t(size_t, size - 1, ipb->ccw.vm_parm_len);
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memcpy(dest, ipb->ccw.vm_parm, len);
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/* If at least one character is lowercase, we assume mixed
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* case; otherwise we convert everything to lowercase.
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*/
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for (i = 0; i < len; i++)
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if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
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(dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
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(dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
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has_lowercase = 1;
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break;
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}
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if (!has_lowercase)
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EBC_TOLOWER(dest, len);
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EBCASC(dest, len);
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}
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dest[len] = 0;
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return len;
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}
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